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throw an error on get-output-string on non-string-ports (issue #621)

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Alex Shinn 2020-03-25 17:15:06 +09:00
parent d19ee75800
commit 1795014dae
1 changed files with 2 additions and 0 deletions
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sexp.c
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@ -1708,6 +1708,8 @@ sexp sexp_get_output_string_op (sexp ctx, sexp self, sexp_sint_t n, sexp out) {
sexp_assert_type(ctx, sexp_oportp, SEXP_OPORT, out);
if (!sexp_port_openp(out))
return sexp_xtype_exception(ctx, self, "output port is closed", out);
if (!sexp_pairp(sexp_port_cookie(out)))
return sexp_xtype_exception(ctx, self, "not a string output port", out);
sexp_gc_preserve3(ctx, ls, rev, tmp);
if (sexp_port_offset(out) > 0) {
tmp = sexp_c_string(ctx, sexp_port_buf(out), sexp_port_offset(out));